| Mecynostomum haplovarium Dörjes, 1968 | Sep 1963 |  | medium sand |  | 
| Typhlopolycystis coeca Karling, 1956 | 1956 or earlier |  | coarse sand, gravel | (Ax), slope. | 
| Promesostoma meixneri Ax, 1951 | Sep 1973 |  | sand | Sand flat.  Frequent. | 
| Promesostoma meixneri Ax, 1951 | Apr 1970 |  | sand | Sand flat.  Frequent. | 
| Petaliella spiracauda Ehlers, 1974 | Apr 1970 |  | sand | middle sand Watt.  3 individuals. | 
| Messoplana falcata falcata (Ax, 1953) | Apr 1970 |  | sand | sand Watt.  4 specimens. | 
| Mariplanella frisia Ax & Heller, 1970 | Apr 1970 |  | sand | Sand Watt.  Several. | 
| Lonchoplanella axi Ehlers, 1974 | Apr 1970 |  | sand | south.  Pure sand Watt, 20 - 60 m from the beach break.  5 individuals. | 
| Adenopharynx mitrabursalis Ehlers, 1972 | Apr 1970 |  | sand | 2 specimens. | 
| Aulopharynx aestuarius Ehlers, 1972 | Apr 1970 |  | sand | Detritus holding Sandwatt.  50 m from the breakwater.  1 specimen. | 
| Doliopharynx geminocirro Ehlers, 1972 | Apr 1970 |  | sand | Sandwatt.  50 m from the breakwater.  1 specimen. | 
| Microstomum papillosum Graff, 1882 | Jun 1973 |  | sand | Sandy beach slopes and wadden areas. | 
| Microstomum spiculifer Faubel, 1974 | Oct 1973 |  |  | sandy beach slopes and wadden areas of the Litoralstation List.  Some animals. | 
| Macrostomum pusillum Ax, 1951 | Jun, Jul, Oct 1973 |  |  | beach break, south List.   Some animals. | 
| Coelogynopora biarmata Steinböck, 1924 | Apr 1970 |  |  | Buhne List-Süd.  Im vorderen Sandwatt.  Zahlreich. | 
| Bulbotoplana acephala Ax, 1956 | Apr 1970 |  |  | Buhne List-Süd.  Zahlreich. | 
| Nematoplana coelogynoporoides Meixner, 1938 | Apr 1970 |  |  | Buhne List-Süd.  Im Sandwatt.  Einige Exemplare. | 
| Drepanilla limophila Ehlers, 1979 | Jul 6, 1951 |  |  | Buhne List-Süd (Höhe, 'Villa Hübner'), (leg. P. Ax) |